Steam-shovel.



T. SGHOGK.

STEAM sHovBL.

I APPLIOATION FILED SEPT. 23, 1912. 1,074,018. Patenwa sept.23,1913.

A TTORNEY su'. mmllllullllulnunlmmn WITH/8858:

UNITED STATES PATENT OFFICE.

THOMAS SCHOCK, 0F EUGENE, OREGON.

STEAM-SHGVEL.

b all `ita/om it may concern:

le it known that I, THOMAS Scnocli, a citizen ot the United States, and resident of Eugene. in the county of Lane and State of Oregon, have invented new and useful Improvements in Steam-Shovels, of which the following is a specification.

My invention relates to a portable digging apparatus of the type usually known as a .steam shovel and has for its object, in a general sense, to provide such a machine of simple and inexpensive construction.

One of the more specific objects of my invention is to introduce a novel means of supporting the boom of the machine, in order to readily adapt the machine for various purposes, such as, side cutting, thorough cutting or trench cutting.

A further object is to embody a bucket shaped dipper and to hang said dipper on a carriage, which in turn is mounted to travel on said boom, all for the purpose to be hereinafter more fully explained.

In order to facilitate the reading of thc following description, a drawing is hereto annexed, in which is illustrated the p rin ciple and operation of my device.

In the drawing: Figure 1 is a side elevation of my machine, showing dill'erent positions of the machine during its operation, and Fig. 2 shows, in front. elevation, some of the parts of the machine.

The machine is mounted to rotate on a wheel truck 1 in any suitable manner, as by a power driven pinion 2 of the machine engaging a gear 3 of the truck. Oninachine platform 4 is mounted a power unit comprising a boiler 5 and a steam engine t5, the latter operatively connected to rotate a series of drums 7, S and 27. On the platform 4, in front of the said drums, is pivotally hung a boom 9, from the outer end of which extends a cable 10, said cable having its inner end secured on the first named drum 7. On the pivot l1, by means of which the boom is supported, is journaled an arm 1Q, the upper end of which is perforated to ro tatably support a sheave 13. The said arm is held in position by means of a link 11i, said link connecting the upper end of the arm with a portion 4ot the machine frame. By referring to the drawing it is readily seen how the drum 7 in rotating, raises and lowers the boom as conditions require.

The boom is made from a steel bar, presenting in cross section the shape of an I- Specification of Letters Patent.

Application filed September 23, 1912.

Patented Sept. 23, 1913.

Serial No. 721,970.

beam, or it may be composed of two channel irons, riveted back to back, as shown in Fig. 2. A dipper carriage, comprising a frame 15 n-ovided with a series of rollers 16, is mounted to travel in the'side channels of the boom, and on the lower end of said frame is pivotally supported a dipper 17. Saidlcarriage is operatively connected with the drum 8 of the engine by means of an endless cable 18, which unwinds from the drum, passes over an idler 19 at the end of the boom, from which it extends .under neath the boom and over a second idler 2t), thence returning to the drum. The dipper frame is ri idly secured to the lower strand of the cabllz 18. By rotating the drum 8, the said frame, carrying the dipper, is caused to travel back and forth on the boom. It is noticed that the idler 20 is mounted to rotate on the boom pivot 11, the boom mayV The front portion of the boom is curvedso as to give the bucket a circular sweep during the digging operation. A series of idlers Q1. are rotatably mounted on the curved portion of the boom for the purpose of luidingll the lower strand of the dipper cable 1S. As already stated, the dipper is made in the form of a bucket, .said bucket comprisingtwo halves 17 and 1T". The said halves are held locked together by a suitable latch mechanism 2Q. From the releasingr bolt 523 of said latch mechanism ex tends a cable 24 to an endless cable 25, and the latter is hung on idlcrs positioned adjacent. to and on the pivots ol' the idlers 19, 2t) and Q1. During the travel of the dipper on the boom it is necessary that the cable 25, termed the trip cable, follow the Inovement of the bucket. This may be accomplished by extending said cable over the drinn 27, which is mounted on the shaft ot the drum 8 and connected for rotation by the engine. The drums 8 and 27 in that case should be of the same diameter.

Referring now to Fig. 1, the boom 9, as

indicated in full outline, is positioned c0rrectly for grading or for making a thorouglrcut. The dipper is caused to move to take in dirt, and when completely filled, the boom is elevated to the position shown in dotted outline, as indicated by Qn. The whole machine is then caused to turn on the truck until the bucket reaches a point d- 4 parts of the machine is well known to those versed in the art, no-stress has been laid on illustrating or explaining its mechanical details, it being thought suicient to take care that the principle and operation of my device is clearly shown and described. It is therefore understood that minor improvements and changes may be made in order to produce a perfect working machine, and

so as to simplify its construction, without thereby departing from the principle of my invention. It is also understood that the engine is provided with the usual brake` mechanisms, and that the drums are mounted for independent operation by hand lever control or its equivalent.

I claim:

1. In a device of the character described, the combination with a prime mover; of a pivoted boom connected for operation with v sald prime mover; a dipper frame mounted to travel on said boom; means for operatively connecting said frame with said prime mover for movement in both directions; a bucket pivotally hung on said frame, said bucket comprising two halves each of which has an independent cutting edge whereby said bucket is capable 'of performing its function in both directions; a latch-mechanism for inter-lookin said halves; and means operated by saiA prime mover for disconnectmg said bucket halves. 2. In a device of the character described the combination with a prime mover and a series of cable drums operable by said prime mover; of a pivoted boom connected for independent operation with one of said drums, the outer portion of said boom curved upwardly; a dipper frame mounted to travel on said boom; an endless cable hung on a second drum of the series and fixed on said'dipper frame; means for guiding said cable over the curved portion of the boom; and a bucket pivotally hung in said dipper frame, saidbucket made in two portions, each ortion having an indeendent cutting e ge, one of which perorms its function in one direction while the other operates in the opposite direction.

3. In a .device of the character described, the combination with a series of cable drums mounted for independent operation; of a pivoted boom connected for operation with one of said drums, the outer portion of said boom curved upwardly; a dip er frame mounted to travel on said boom tllirough the medium of a second drumA of the series; a bucket pivotally hung in said dipper frame, said bucket made in two halves having each a cutting edge so as to permit the bucket to operate in either direction; means for inter-locking the bucket portions; an endless trip-cable hung on a thirddrum of the series and looped around the boom; means for guiding said trip-cable over the curved portion of the boom; and ashort cable inter-connecting said inter-locking means with said trip-cable lfor the purpose of disconnecting the bucket portions.

4. In a device of the character described, the combination with a series of cable' drums mounted for independent operation; of a pivoted boom connected for operation with the first drum, the outer portion of said boom curved upwardly; a dipper frame mou ted to travel on said boom and moved by he second drum; a bucket pivotally hung in said dipper frame, said bucket comprising two halves having each a cutting edge so as to permit the bucket to operate in either direction; a latch for in.

ter-locking said halves; a bolt for releasing said latch; an endless trip-cable wound on the third drum of the series and looped around the boom; means for guiding said trip-cable over the curved portion of the said trip-cable and said bolt; the devices so arranged that the trip-cable normally follows the travel of the dipper frame, and so that the changing of the movement of the trip-cable relative to the said frame causes the said bolt to disconnect the bucket halves.

5. In a device of the character described, a traveling bucket, made in two portions, each port-ion having anindependent cutting edge whereby the bucket is enabled to perform its function in either direction, means for interlocking the two portions and means for releasing said inter-locking means, said means including an endless trip-cable normally following the travel of the bucket and independently movable relative to said bucket for the purpose of eecting said release.

THOMAS SCHO'CK. lVitnesses R. S. HAMILTON, RUTH KELLOGG.

boom; and a short cable inter-connecting, 

